After highlighting Trump’s tweet this morning about revolutionizing and modernizing the nuclear arsenal, Tapper decided to revisit some of Trump’s past comments related to nuclear weapons. And what he found is that the president has displayed three disturbing themes — loose talk about nukes, a belief that more nations should have them, and an overall lack of knowledge on the subject.

“That brings us to the current standoff,” Tapper said, after listing these concerns about Trump and nuclear weapons.

The host then replayed Trump’s “fire and fury” rant while highlighting that it was on this day in 1945 when the United States dropped a nuke on Nagasaki.

“To say the obvious, this is a time when words should be chosen and measured carefully,” he stated. “White House sources tell us the president spoke extemporaneously when he made that statement about fire and fury. Perhaps now may not be the best time to improvise.”